One week after Russia's invasion of Ukraine, US enterprise software giant Oracle has suspended its Russian operations, while Amazon is pledging logistical and cybersecurity support for Ukraine. Meanwhile, Russia's sovereign credit rating has been slashed to junk status by two major ratings agencies and the Moscow Stock Exchange is closed for a fourth consecutive day. We also take a closer look at how the US and EU are working on measures to make sure cryptocurrencies are not used to circumvent sanctions on Russia.